<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="(slide,index) in skuImageList" :key="slide.id">
        <img :src="slide.imgUrl" :class="{active:currentIndex==index}" @click="changeCurrentIndex(index)">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
  import Swiper from 'swiper'
  export default {
    name: "ImageList",
    props:['skuImageList'],
    data(){
      return{
        currentIndex:0
      }
    },
    methods:{
      //点击事件 点击谁谁就高亮
      changeCurrentIndex(index){
        this.currentIndex=index;
        //通知兄弟组件：当前的索引值为几
        this.$bus.$emit('getIndex',this.currentIndex);
      }
    },
    watch:{
       //可以保证数据一定ok，
        skuImageList:{
            //立即监听：不管你数据有没有变化，上来立即监听一次
            immediate:true,
            handler(){
                this.$nextTick(()=>{
                   var mySwiper= new Swiper ('.swiper-container', {
                        //自动播放
                        autoplay: {
                          delay: 3000,
                          stopOnLastSlide: false,
                          disableOnInteraction: false,
                        },
                        //设置显示几个图片
                        slidesPerView:3,
                        //每一次切换图片的个数
                        slidesPerGroup:1,
                        // 如果需要前进后退按钮
                        navigation: {
                            nextEl: '.swiper-button-next',
                            prevEl: '.swiper-button-prev',
                        }
                    }) 
                   
                })
            }
        }
    }
  }
</script>

<style lang="less" scoped>
  .swiper-container {
    height: 56px;
    width: 412px;
    box-sizing: border-box;
    padding: 0 12px;

    .swiper-slide {
      width: 56px;
      height: 56px;

      img {
        width: 100%;
        height: 100%;
        border: 1px solid #ccc;
        padding: 2px;
        width: 50px;
        height: 50px;
        display: block;

        &.active {
          border: 2px solid #f60;
          padding: 1px;
        }

        // &:hover {
        //   border: 2px solid #f60;
        //   padding: 1px;
        // }
      }
    }

    .swiper-button-next {
      left: auto;
      right: 0;
    }

    .swiper-button-prev {
      left: 0;
      right: auto;
    }

    .swiper-button-next,
    .swiper-button-prev {
      box-sizing: border-box;
      width: 12px;
      height: 56px;
      background: rgb(235, 235, 235);
      border: 1px solid rgb(204, 204, 204);
      top: 0;
      margin-top: 0;
      &::after {
        font-size: 12px;
      }
    }
  }
</style>